//first one
#include<stdio.h>
main()
{
char *a="total";
int n=5;
int i,j,flag=1;
for(i=0;i<n;i++)
{
for(j=0;j<n && flag!=0;j++)
{
if(a[i]==a[j] && i!=j)break;
else if(a[i]!=a[j] && j==n-1){ printf("%c",a[i]);flag=0; break;}
}
}
}
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